CN104901090B - A kind of conversion voltage-type leakage protecting plug - Google Patents
A kind of conversion voltage-type leakage protecting plug Download PDFInfo
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- CN104901090B CN104901090B CN201510291054.2A CN201510291054A CN104901090B CN 104901090 B CN104901090 B CN 104901090B CN 201510291054 A CN201510291054 A CN 201510291054A CN 104901090 B CN104901090 B CN 104901090B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/665—Structural association with built-in electrical component with built-in electronic circuit
- H01R13/6683—Structural association with built-in electrical component with built-in electronic circuit with built-in sensor
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
- H01R13/66—Structural association with built-in electrical component
- H01R13/70—Structural association with built-in electrical component with built-in switch
- H01R13/713—Structural association with built-in electrical component with built-in switch the switch being a safety switch
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/26—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
Abstract
The present invention relates to a kind of conversion voltage-type leakage protecting plug, feature is including electrical apparatus release JL, ground wire E false voltage control circuit, hookup, first and second fault current sensor circuit, electrical switch and fault current control circuit；Fisrt fault current-sensing circuit includes the first zero sequence current mutual inductor, and the first zero sequence current mutual inductor is set on the zero line N and live wire L of city's alternating current；Second fault current sensor circuit includes the second zero sequence current mutual inductor and the second permutator, and the second zero sequence current mutual inductor is set on the ground wire E of city's alternating current, and the two ends of the second permutator are electrically connected with the two ends of the second zero sequence current mutual inductor respectively；The outfan of electrical switch is electrically connected with the live wire L of city's alternating current by electrical apparatus release JL；The input of ground wire E false voltage control circuit is electrically connected with the ground wire E of city's alternating current, and the outfan of its outfan and fault current control circuit is all electrically connected with the input of electrical switch.It is simple that it has a circuit structure, is increased without voltage transformer and processing and amplifying, using safer the advantages of.
Description
Technical field
The present invention relates to a kind of conversion voltage-type leakage protecting plug.
Background technology
Existing conversion voltage-type leakage protecting plug is the failure voltage signal sensing ground wire with voltage transformer, so
Switch off and substitute the input that failure voltage signal is sent into amplification treatment circuit by current transformer afterwards with switching, amplified
It is sent to control electronic switching circuit after process again, force the electrical apparatus release action power-off to contact with three.This circuit structure is complicated,
It is also possible that signal phase is overlapped mutually or offsets（Subtract each other）Caused false voltage or the fault current exceeded phenomenon of drift,
And failure voltage signal is easy to seal in other interference signals when the multiple circuit such as amplification, leads to poor anti jamming capability,
Misoperation is serious.
Content of the invention
The purpose of the present invention is to overcome the deficiencies in the prior art and provide a kind of circuit structure simple, i.e. property-line fault electricity
Pressure signal direct drive（Without work process such as processing and amplifying）, it is increased without the circuit such as voltage transformer and processing and amplifying, both
The actual electrical leakage voltage of ground wire can accurately be sensed, may filter out other interference signals, strong antijamming capability, safe and reliable
Conversion voltage-type leakage protecting plug.
In order to achieve the above object, the present invention is achieved in that it is a kind of conversion voltage-type leakage protecting plug, its
Be characterised by including with three to the electrical apparatus release JL of contact, ground wire E false voltage sensor circuit, hookup, Fisrt fault electric current
Sensor circuit, the second fault current sensor circuit, electrical switch and fault current control circuit；Wherein
Three pairs of contacts of described electrical apparatus release JL are connected on ground wire E, zero line N and live wire L respectively, and electrical apparatus release JL also includes making three
The reset key that contact is resetted；
Described Fisrt fault current-sensing circuit includes the first zero sequence current mutual inductor, described first zero sequence current mutual inductor
Be set on the zero line N and live wire L of city's alternating current, the two ends of the first zero sequence current mutual inductor respectively with fault current control circuit
One group of input bipod electrical connection；
One end of described hookup is electrically connected with the zero line N input of city's alternating current, the other end with through the first zero sequence
The live wire L outfan electrical connection of city's alternating current of current transformer；
Described second fault current sensor circuit includes the second zero sequence current mutual inductor and the second permutator, and described second
Zero sequence current mutual inductor is set on the ground wire E of city's alternating current, the two ends of the second zero sequence current mutual inductor respectively with fault current
The bipod electrical connection of another input of control circuit, the two ends of described second permutator respectively with the second zero sequence current mutual inductance
The two ends electrical connection of device；
The outfan of described electrical switch is electrically connected with the live wire L of city's alternating current by electrical apparatus release JL；
The input of described ground wire E false voltage control circuit is electrically connected with the ground wire E of city's alternating current, ground wire E fault electricity
The outfan of the outfan of pressure control circuit and fault current control circuit is all electrically connected with the input of electrical switch.
Described ground wire E false voltage control circuit include the first permutator, the 3rd varistor, the 5th resistance, second
Diode, the 3rd diode, the 8th electric capacity and optocoupler pipe；One end of wherein said first permutator is electrically connected with ground wire E, separately
One end is electrically connected with one end of the 5th resistance and one end of the 3rd varistor respectively；The other end of described 3rd varistor divides
Do not electrically connect with 2 feet of zero line N, the negative pole end of the 8th electric capacity and optocoupler pipe, the other end of described 5th resistance and the two or two pole
The positive pole electrical connection of pipe, the negative pole of described second diode is electrically connected with the positive terminal of the 8th electric capacity and 1 foot of optocoupler pipe respectively,
The described negative pole end of the 8th electric capacity and 2 feet of optocoupler pipe are electrically connected with zero line N respectively, 3 feet of described optocoupler pipe and electrical switch
Power positive end electrical connection, 4 feet of optocoupler pipe are electrically connected with the positive pole of the 3rd diode, the negative pole of the 3rd diode and electronics
The input electrical connection of switch.
Described fault current control circuit includes processing and amplifying integrated package, the second to the 5th electric capacity, the first diode and
Two resistance；Model RT54123B of wherein said processing and amplifying integrated package, 1 foot of processing and amplifying integrated package and 2 feet respectively with
The two ends electrical connection of the first zero sequence current mutual inductor, 2 feet of processing and amplifying integrated package and 3 feet respectively with the second zero sequence current mutual inductance
The two ends electrical connection of device, 4 feet of processing and amplifying integrated package are electrically connected with the bridge rectifier negative pole of electrical switch, processing and amplifying collection
8 feet of in bulk are electrically connected with the bridge rectifier positive pole of electrical switch after second resistance current limliting；Described second electric capacity is just
Negative pole is electrically connected with 8 feet of processing and amplifying integrated package and 4 feet respectively, and the two ends of described 3rd electric capacity are integrated with processing and amplifying respectively
6 feet of block and the electrical connection of 7 feet, the two ends of described 4th electric capacity are electrically connected with 4 feet of processing and amplifying integrated package and 5 feet respectively, institute
The two ends stating the 5th electric capacity are electrically connected with 2 feet of processing and amplifying integrated package and 4 feet respectively；The positive pole of described first diode with put
Big 7 feet processing integrated package are outfan electrical connection, and the negative pole of the first diode is electrically connected with the input of electrical switch.
Described electrical switch includes bridge rectifier, controllable silicon, the first electric capacity, the second varistor and Zener diode；
One input of wherein said bridge rectifier is electrically connected with the live wire L of city's alternating current by electrical apparatus release JL, bridge rectifier
Another input is electrically connected with the zero line N of city's alternating current, and described second varistor is connected in parallel on the positive negative output of bridge rectifier
On end；Described silicon controlled positive pole and negative pole are connected in parallel on the positive-negative output end of bridge rectifier；One end of described first electric capacity
Electrically connect with 4 feet of the negative output terminal of bridge rectifier, the positive pole of Zener diode and processing and amplifying integrated package respectively, the first electricity
The other end holding respectively with the negative pole of Zener diode, silicon controlled control pole, the negative pole of the 3rd diode and the first diode
Negative pole electrical connection.
In the technical program, also include 3rd resistor and the 6th electric capacity, after described 3rd resistor is in parallel with the 6th electric capacity
Be electrically connected to both ends of on the two ends of the first zero sequence current mutual inductor.
In the technical program, also include the 4th resistance and the 7th electric capacity, after described 4th resistance is in parallel with the 7th electric capacity
Be electrically connected to both ends of on two outfans of the second zero sequence current mutual inductor.
Described hookup include test switch and test resistance, described test switch connect with test resistance after one end and
Through the live wire L outfan electrical connection of major loop transformer, the other end is electrically connected with zero line N input.
Present invention advantage compared with prior art is：Circuit structure is simple, is increased without at voltage transformer and amplification
The circuit such as reason, and ground wire voltage signal is not amplified etc., and circuit is applied directly to silicon controlled control pole, accurately can sense ground
Line electrical leakage voltage and can filter out induced voltage, can be prevented effectively from again and be mutually mixed caused by interference because of amplifying circuit signal
Misoperation etc. is bad；In addition the ground wire false voltage process circuit of this circuit and fault current process circuit（Including major loop and
Earthing pole）Each independent, mutually do not involve, can be prevented effectively from because signal phase is overlapped mutually or offsets（Subtract each other）Caused fault
Voltage or the fault current exceeded phenomenon of drift, more safe and reliable.
Brief description
Fig. 1 is circuit theory diagrams of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawings the specific embodiment of the present invention is described further.Here it should be noted that for
The explanation of these embodiments is used to help understand the present invention, but does not constitute limitation of the invention.Additionally, it is disclosed below
As long as each embodiment of the present invention in involved technical characteristic do not constitute conflict each other and just can be combined with each other.
In describing the invention, term " first " and " the 7th " are only used for describing purpose, and it is not intended that instruction or
Hint relative importance.
As shown in figure 1, it is a kind of conversion voltage-type leakage protecting plug, including with three to the electrical apparatus release JL1 of contact,
Line E false voltage sensor circuit 2, hookup 3, Fisrt fault current-sensing circuit 4, the second fault current sensor circuit 5, electricity
Son switch 6 and fault current control circuit 7；Wherein
Three pairs of contacts of described electrical apparatus release JL1 are connected on ground wire E, zero line N and live wire L respectively, and electrical apparatus release JL1 also includes making
The reset key RESET that three pairs of contacts reset；
Described Fisrt fault current-sensing circuit 4 includes the first zero sequence current mutual inductor ZCT1, described first zero-sequence current
Transformer ZCT1 is set on the zero line N and live wire L of city's alternating current, the two ends of the first zero sequence current mutual inductor ZCT1 respectively with therefore
The bipod electrical connection of one group of input of barrier current control circuit 7；
One end of described hookup 3 is electrically connected with the zero line N input of city's alternating current, the other end with through the first zero sequence
The live wire L outfan electrical connection of city's alternating current of current transformer ZCT1；
Described second fault current sensor circuit 5 includes the second zero sequence current mutual inductor ZCT2 and the second permutator Kv2,
Described second zero sequence current mutual inductor ZCT2 is set on the ground wire E of city's alternating current, and the two of the second zero sequence current mutual inductor ZCT2
End is electrically connected with the bipod of another input of fault current control circuit 7 respectively, and the two ends of described second permutator Kv2 are divided
Do not electrically connect with the two ends of the second zero sequence current mutual inductor ZCT2；
The outfan of described electrical switch 6 is electrically connected with the live wire L of city's alternating current by electrical apparatus release JL1；
The input of described ground wire E false voltage sensor circuit 2 is electrically connected with the ground wire E of city's alternating current, ground wire E fault electricity
The outfan of the outfan of pressure sensor circuit 2 and fault current control circuit 7 is all electrically connected with the input of electrical switch 6.
Described hookup 2 includes test switch TEST and test resistance R1, described test switch TEST and test resistance
After R1 series connection, one end is electrically connected with the live wire L outfan through major loop transformer, and the other end is electrically connected with zero line N input.
Process of the test:Press test switch TEST, the live wire L through the first zero sequence current mutual inductor ZCT1 is connect by test resistance R1
Logical input zero-power line N, produces a test（Simulation leak current fault）Current signal, and cut by above-mentioned abnormal dropout process
Power-off source；The reset key RESET and test switch TEST cooperation of electrical apparatus release, can also use as on and off switch.
In the present embodiment, described ground wire E false voltage control circuit 2 includes the first permutator Kv1, the 3rd pressure-sensitive electricity
Resistance Ru3, the 5th resistance R5, the second diode D2, the 3rd diode D3, the 8th electric capacity C8 and optocoupler pipe GQ；Wherein said first
One end of permutator Kv1 is electrically connected with ground wire E, other end one end and the 3rd varistor Ru3 with the 5th resistance R5 respectively
One end electrical connection；The other end of described 3rd varistor Ru3 is electrically connected with zero line N, the other end of described 5th resistance R5
Electrically connect with the positive pole of the second diode D2, negative pole positive terminal and the light with the 8th electric capacity C8 respectively of described second diode D2
The 1 foot electrical connection of coupling pipe GQ, the negative pole end of described 8th electric capacity C8 and 2 feet of optocoupler pipe GQ are electrically connected with zero line N respectively, described
3 feet of optocoupler pipe GQ electrically connect the defeated of i.e. 3 feet of optocoupler pipe GQ and following current-limiting resistance R2 with the power positive end of electrical switch 6
Go out end electrical connection, 4 feet of optocoupler pipe GQ are electrically connected with the positive pole of the 3rd diode D3, the negative pole of the 3rd diode and electrical switch
6 input electrical connection.
In the present embodiment, described fault current control circuit 7 includes processing and amplifying ic chip, the second to the 5th electric capacity
C2-C5, the first diode D1 and second resistance R2；Model RT54123B of wherein said processing and amplifying ic chip, amplifies
Process 1 foot of ic chip and 2 feet are electrically connected with the two ends of the first zero sequence current mutual inductor ZCT1 respectively, processing and amplifying integrated package
2 feet of IC and 3 feet are electrically connected with the two ends of the second zero sequence current mutual inductor ZCT2 respectively, 4 feet of processing and amplifying ic chip with
The bridge rectifier QD negative pole electrical connection of electrical switch 6,8 feet of processing and amplifying ic chip by second resistance R2 current limliting after and
The bridge rectifier QD positive pole electrical connection of electrical switch 6；The both positive and negative polarity of described second electric capacity C1 respectively with processing and amplifying integrated package
8 feet of IC and the electrical connection of 4 feet, the two ends of described 3rd electric capacity C3 are electrically connected with 6 feet of processing and amplifying ic chip and 7 feet respectively
Connect, the two ends of described 4th electric capacity C4 are electrically connected with 4 feet of processing and amplifying ic chip and 5 feet respectively, described 5th electric capacity C5
Two ends electrically connect with 2 feet of processing and amplifying ic chip and 4 feet respectively；The positive pole of described first diode D1 and processing and amplifying
7 feet of ic chip are outfan electrical connection, and the negative pole of the first diode D1 is electrically connected with the input of electrical switch 6.
In the present embodiment, described electrical switch 6 includes bridge rectifier QD, controllable silicon Q, the first electric capacity C1, the second pressure
Quick resistance Ru2 and Zener diode DW；One input of wherein said bridge rectifier QD passes through electrical apparatus release JL1 and city's alternating current
Live wire L electrical connection, bridge rectifier（QD）Another input electrically connect with the zero line N of city's alternating current, described second is pressure-sensitive
Resistance Ru2 is connected in parallel on the positive-negative output end of bridge rectifier QD；The positive pole of described controllable silicon Q and negative pole are connected in parallel on bridge rectifier
On the positive-negative output end of device QD；One end of described first electric capacity C1 negative output terminal, voltage stabilizing two pole with bridge rectifier QD respectively
4 feet electrical connections of the positive pole of pipe DW and processing and amplifying ic chip, the other end of the first electric capacity C1 respectively with Zener diode DW
Negative pole, the control pole of controllable silicon Q, the negative pole of the 3rd diode D3 and the first diode D1 negative pole electrical connection.
In the present embodiment, 3rd resistor R3 and the 6th electric capacity C6, described 3rd resistor R3 and the 6th electric capacity C6 are also included
Being electrically connected to both ends of on the two ends of the first zero sequence current mutual inductor ZCT1 after parallel connection.
In the present embodiment, the 4th resistance R4 and the 7th electric capacity C7, described 4th resistance R4 and the 7th electric capacity C7 are also included
Being electrically connected to both ends of on two outfans of the second zero sequence current mutual inductor ZCT2 after parallel connection.
In the present embodiment, also include the first varistor Ru1；One end of described first varistor Ru1 is exchanged with city
The zero line N electrical connection of electricity, the other end is electrically connected with the live wire of city's alternating current, and the first varistor Ru1 is used for preventing electric appliance load
And this product suffers from surge voltage and lightning impulse.
Leakage current failure protection process：First permutator Kv1 and the second permutator Kv2 is off, this
When major loop or ground wire if leakage current fault occurs, be set in the first zero sequence current mutual inductor ZCT1 on power line L, N or
The second zero sequence current mutual inductor ZCT2 being set on ground wire E will sense major loop or ground wire fault-current signal immediately,
And send it to the input 1,2 or 2 of processing and amplifying ic chip, 3 feet, pass through the one or two pole by 7 feet after amplified process
Pipe D1 exports the control pole of controllable silicon Q, and triggering controllable silicon Q turns on immediately, by the both positive and negative polarity short circuit of bridge rectifier QD, make across
The trip coil JL being connected on power firestreak is directly turned on zero line immediately, produces powerful electric current and magnetic field, pulls and threads off
Mechanism trips, and the live wire of power supply, zero line and earth lead are cut off simultaneously.
Electrical leakage voltage failure protection process：Press permutator, i.e. the first permutator Kv1 and the second permutator Kv2
It is in closure conducting state, the second zero sequence current mutual inductor ZCT2, by the second permutator Kv2 short circuit, has cut off and has been input to amplification
Process ic chip 2, the ground wire fault-current signal of 3 feet, so being now grounded（E）Line no matter occur great fault current,
This mechanism（Circuit）All without action；Now（Permutator Kv1, Kv2 are in closure state) if there is ground strip electric fault, therefore
Barrier voltage signal is sent to the 5th resistance R5 by the first permutator Kv1, through the 5th resistance R5 current limliting（Or pressure limiting）With second
Be converted to DC voltage after diode D2 rectification and the 8th electric capacity C8 filtering to be added on 1 foot of optocoupler pipe GQ, when false voltage reaches
To certain value（36~50V）When, the LED within optocoupler pipe GQ can send light so as to be connected across 3,4 feet it
Between photoconductive resistance（Quasiconductor）Resistance reduce, positive supply voltage can pass through current-limiting resistance R2,3,4 feet of optocoupler pipe GQ
It is applied to the control pole of controllable silicon Q with the 3rd diode D3, triggering controllable silicon Q turns at once, so that tripping coil JL is passed through immediately
Very big electric current simultaneously produces high-intensity magnetic field, pull electrical apparatus release iron core link simultaneously tripping mechanism tripping operation power-off；3rd varistor Ru3
The misoperation caused by surge voltage of ground wire sensing can effectively be prevented；Zener diode DW is then used for protecting controllable silicon from height
Voltge surge damages.
Above in association with accompanying drawing, embodiments of the present invention are explained in detail, but the present invention is not limited to described reality
Apply mode.For the ordinary skill in the art, to these in the case of the principle without departing from the present invention and objective
Embodiment carries out multiple changes, modification, replacement and deformation and still falls within the scope of the present invention.
Claims (6)
1. a kind of conversion voltage-type leakage protecting plug is it is characterised in that include with three electrical apparatus release JL to contact（1）, ground wire E
False voltage control circuit（2）, hookup（3）, Fisrt fault current-sensing circuit（4）, the second fault current sensor circuit
（5）, electrical switch（6）And fault current control circuit（7）；Wherein
Described electrical apparatus release JL（1）Three pairs of contacts be connected on respectively on ground wire E, zero line N and live wire L, electrical apparatus release JL（1）Also include making
The reset key that three pairs of contacts reset（RESET）；
Described Fisrt fault current-sensing circuit（4）Including the first zero sequence current mutual inductor（ZCT1）, described first zero-sequence current
Transformer（ZCT1）It is set on the zero line N and live wire L of city's alternating current, the first zero sequence current mutual inductor（ZCT1）Two ends respectively
With fault current control circuit（7）One group of input bipod electrical connection；
Described hookup（3）One end electrically connect with the zero line N input of city's alternating current, the other end with through first zero sequence electricity
Current transformer（ZCT1）City's alternating current live wire L outfan electrical connection；
Described second fault current sensor circuit（5）Including the second zero sequence current mutual inductor（ZCT2）And second permutator
（Kv2）, described second zero sequence current mutual inductor（ZCT2）It is set on the ground wire E of city's alternating current, the second zero sequence current mutual inductor
（ZCT2）Two ends respectively with fault current control circuit（7）Another input bipod electrical connection, described second conversion open
Close（Kv2）Two ends respectively with the second zero sequence current mutual inductor（ZCT2）Two ends electrical connection；
Described electrical switch（6）Outfan pass through electrical apparatus release JL（1）Electrically connect with the live wire L of city's alternating current；
Described ground wire E false voltage control circuit（2）Input electrically connect with the ground wire E of city's alternating current, ground wire E false voltage
Control circuit（2）Outfan and fault current control circuit（7）Outfan all and electrical switch（6）Input be electrically connected
Connect；
Described ground wire E false voltage control circuit（2）Including the first permutator（Kv1）, the 3rd varistor（Ru3）, the 5th
Resistance（R5）, the second diode（D2）, the 3rd diode（D3）, the 8th electric capacity（C8）And optocoupler pipe（GQ）；Wherein said first
Permutator（Kv1）One end electrically connect with ground wire E, the other end respectively with the 5th resistance（R5）One end and the 3rd varistor
（Ru3）One end electrical connection；Described 3rd varistor（Ru3）The other end electrically connect with zero line N, described 5th resistance（R5）
The other end and the second diode（D2）Positive pole electrical connection, described second diode（D2）Negative pole respectively with the 8th electric capacity
（C8）Positive terminal and optocoupler pipe（GQ）1 foot electrical connection, described 8th electric capacity（C8）Negative pole end and optocoupler pipe（GQ）2 feet
Electrically connect with zero line N respectively, described optocoupler pipe（GQ）3 feet and electrical switch（6）Power positive end electrical connection, optocoupler pipe
（GQ）4 feet and the 3rd diode（D3）Positive pole electrical connection, the negative pole of the 3rd diode and electrical switch（6）Input electricity
Connect.
2. conversion voltage-type leakage protecting plug according to claim 1 is it is characterised in that described fault current controls electricity
Road（7）Including processing and amplifying integrated package（IC）, the second to the 5th electric capacity（C2-C5）, the first diode（D1）And second resistance
（R2）；Wherein said processing and amplifying integrated package（IC）Model RT54123B, processing and amplifying integrated package（IC）1 foot and 2 feet
Respectively with the first zero sequence current mutual inductor（ZCT1）Two ends electrical connection, processing and amplifying integrated package（IC）2 feet and 3 feet respectively with
Second zero sequence current mutual inductor（ZCT2）Two ends electrical connection, processing and amplifying integrated package（IC）4 feet and electrical switch（6）Bridge
Formula commutator (QD) negative pole electrically connects, processing and amplifying integrated package（IC）8 feet pass through second resistance（R2）With electronic cutting after current limliting
Close（6）Bridge rectifier（QD）Positive pole electrically connects；Described second electric capacity（C2）Both positive and negative polarity respectively with processing and amplifying integrated package
（IC）8 feet and 4 feet electrical connection, described 3rd electric capacity（C3）Two ends respectively with processing and amplifying integrated package（IC）6 feet and 7 feet
Electrical connection, described 4th electric capacity（C4）Two ends respectively with processing and amplifying integrated package（IC）4 feet and the electrical connection of 5 feet, described the
Five electric capacity（C5）Two ends respectively with processing and amplifying integrated package（IC）2 feet and 4 feet electrical connection；Described first diode（D1）'s
Positive pole and processing and amplifying integrated package（IC）7 feet be outfan electrical connection, the first diode（D1）Negative pole and electrical switch（6）
Input electrical connection.
3. a kind of conversion voltage-type leakage protecting plug according to claim 1 and 2 is it is characterised in that described electrical switch
（6）Including bridge rectifier（QD）, controllable silicon（Q）, the first electric capacity（C1）, the second varistor（Ru2）And Zener diode
（DW）；Wherein said bridge rectifier（QD）An input pass through electrical apparatus release JL（1）Electrically connect with the live wire L of city's alternating current,
Bridge rectifier（QD）Another input electrically connect with the zero line N of city's alternating current, described second varistor（Ru2）It is connected in parallel on
Bridge rectifier（QD）Positive-negative output end on；Described controllable silicon（Q）Positive pole and negative pole be connected in parallel on bridge rectifier（QD）'s
On positive-negative output end；Described first electric capacity（C1）One end respectively with bridge rectifier（QD）Negative output terminal, Zener diode
（DW）Positive pole and processing and amplifying integrated package（IC）4 feet electrical connection, the first electric capacity（C1）The other end respectively with voltage stabilizing two pole
Pipe（DW）Negative pole, controllable silicon（Q）Control pole, the 3rd diode（D3）Negative pole and the first diode（D1）Negative pole be electrically connected
Connect.
4. a kind of conversion voltage-type leakage protecting plug according to claim 1 is it is characterised in that also include 3rd resistor
（R3）And the 6th electric capacity（C6）, described 3rd resistor（R3）With the 6th electric capacity（C6）Being electrically connected to both ends of first after parallel connection
Zero sequence current mutual inductor（ZCT1）Two ends on.
5. a kind of conversion voltage-type leakage protecting plug according to claim 1 is it is characterised in that also include the 4th resistance
（R4）And the 7th electric capacity（C7）, described 4th resistance（R4）With the 7th electric capacity（C7）Being electrically connected to both ends of second after parallel connection
Zero sequence current mutual inductor（ZCT2）Two outfans on.
6. a kind of conversion voltage-type leakage protecting plug according to claim 1 is it is characterised in that described hookup（2）
Including test switch（TEST）And test resistance（R1）, described test switch（TEST）With test resistance（R1）After series connection one end with
Through the live wire L outfan electrical connection of major loop transformer, the other end is electrically connected with zero line N input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510291054.2A CN104901090B (en) | 2015-06-01 | 2015-06-01 | A kind of conversion voltage-type leakage protecting plug |
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| CN201510291054.2A CN104901090B (en) | 2015-06-01 | 2015-06-01 | A kind of conversion voltage-type leakage protecting plug |
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| CN108539538A (en) * | 2018-04-07 | 2018-09-14 | 佛山市顺德区信辉达电子有限公司 | Three pole break-make leakage protecting plugs |
| CN112436483B (en) * | 2020-11-06 | 2023-01-31 | 江西百盈高新技术股份有限公司 | Leakage protection circuit |
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| DE1538520A1 (en) * | 1966-05-04 | 1970-02-19 | Const De Vaux Andigny Acova S | Device for checking the insulation of electrical devices and / or systems |
| GB1333918A (en) * | 1970-05-02 | 1973-10-17 | Lucas Industries Ltd | Instruments for checking the operation of earth leakage circuit breakers |
| CN2802714Y (en) * | 2005-06-24 | 2006-08-02 | 安徽飞达实业股份有限公司 | Leakage circuit breaker |
| CN101459302A (en) * | 2008-12-26 | 2009-06-17 | 钱加灿 | All-purpose leakage protection plug for ground wire live trip |
| CN202159961U (en) * | 2011-07-28 | 2012-03-07 | 深圳市良辉科技有限公司 | Ground wire safe voltage control system |
| CN104505667A (en) * | 2014-12-26 | 2015-04-08 | 佛山市顺德区信辉达电子有限公司 | Voltage conversion type leakage protection plug |
| CN104901089B (en) * | 2015-05-13 | 2017-07-14 | 佛山市顺德区信辉达电子有限公司 | Change voltage-type leakage protecting plug |
| CN204696376U (en) * | 2015-06-01 | 2015-10-07 | 佛山市顺德区信辉达电子有限公司 | A kind of changing voltage type leakage protecting plug |
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